When you find Salerno at the BioDome, she escapes through the airlock, and drops her keycard. If you have already turned your eye color to purple to beat the retina scan, you can follow her into the Rock lab.
To enter the Rock lab, you need a keycard (dropped by Salerno when you find her) and purple eyes that you can get from the machine in the Research Lab.
You get the keycard when you follow Salerno to the BioDome. As she escapes, she drops the card by the airlock. You will chase her in the rover to the Rock lab, but you also have to have purple eyes to fool the retina scan. You get them when you are at the Research Lab (upper right by the airlock). To find Salerno, you have to get the tracking device from the Infirmary.
Lunar Colony
There are no guards at all on Lunar Colony. PASE doesn't have any money in the budget.
Lunar Colony became the 29th island released in Poptropica (not counting mini-quests) on September 6, 2012.
It is on the back of the lunar rover. To use it, click it and carry the hook to where you need it.
You turn them purple.
It is attached to the back of the lunar rover. To use it, click it and carry the hook to where you need it.
Only Salerno still has a key card to enter the Rock Lab, but she can apparently get in without one. You only get a keycard when she drops hers at the BioDome. You cannot enter the Rock lab until then. Get the locator device from the Infirmary and you can track her down.
its inside the infermary where maintnace is.
It is in the top right section of the lunar map, just up from the main Moon base.
Once you have recovered the Locator Device, you will find her in the upper room at the BioDome. But she escapes. Pick up her keycard and follow her to the Rock Lab. Get the geiger counter in the storage room (upper room at far right). When you use the counter to find the artifact, she will show up again.